[Xenomai-help] PB to patch a 2.6.16 kernel with an adeos-ipipe-2.6.14-ppc

[Xenomai-help] PB to patch a 2.6.16 kernel with an adeos-ipipe-2.6.14-ppc

[Thomas, Brieuc (GE Healthcare)]

Hi everybody ! 

I've got a PPC-MPC8540 target with a 2.6.16 patch from the provider. I
would like to patch my 2.6.16 kernel with an adeos-ipipe-2.6.14-ppc. Has
somebody already done this?  
Up to now, I've done the patch manually and the compilation with
xenomai-2.1.2...
When I launch my target, the boot run without errors. But when I launch
an Xenomai application (like latency) I've got a "kernel oops" message
(during the task creation).
can somebody help me to patch correctly my kernel?

Brieuc THOMAS.

Re: [Xenomai-help] PB to patch a 2.6.16 kernel with an adeos-ipipe-2.6.14-ppc

[Jan Kiszka]

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Thomas, Brieuc (GE Healthcare) wrote:
> Hi everybody ! 
> 
> I've got a PPC-MPC8540 target with a 2.6.16 patch from the provider. I
> would like to patch my 2.6.16 kernel with an adeos-ipipe-2.6.14-ppc. Has
> somebody already done this?  
> Up to now, I've done the patch manually and the compilation with
> xenomai-2.1.2...

Migrating some version steps upward in 2.6.x can be problematic. Also
the patches you got from the board vendor may collide with ipipe. What
conflicts did you have to resolve? Were you able to verify if those were
not related to relevant functional changes in the kernel?

> When I launch my target, the boot run without errors. But when I launch
> an Xenomai application (like latency) I've got a "kernel oops" message
> (during the task creation).

What does the oops precisely say, what's the backtrace about?

> can somebody help me to patch correctly my kernel?

Is your kernel patch publicly available? What parts does it touch
(critical for ipipe are IRQ and timer management).

Maybe someone from the PPC fraction on this list can comment on the
status of vanilla 2.6.16 vs. 2.6.14, also wrt ipipe/xenomai.

Jan


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Re: [Xenomai-help] PB to patch a 2.6.16 kernel with an adeos-ipipe-2.6.14-ppc

[Philippe Gerum]

On Sun, 2006-07-09 at 19:20 +0200, Jan Kiszka wrote:
> Thomas, Brieuc (GE Healthcare) wrote:
> > Hi everybody ! 
> > 
> > I've got a PPC-MPC8540 target with a 2.6.16 patch from the provider. I
> > would like to patch my 2.6.16 kernel with an adeos-ipipe-2.6.14-ppc. Has
> > somebody already done this?  
> > Up to now, I've done the patch manually and the compilation with
> > xenomai-2.1.2...
> 
> Migrating some version steps upward in 2.6.x can be problematic. Also
> the patches you got from the board vendor may collide with ipipe. What
> conflicts did you have to resolve? Were you able to verify if those were
> not related to relevant functional changes in the kernel?
> 
> > When I launch my target, the boot run without errors. But when I launch
> > an Xenomai application (like latency) I've got a "kernel oops" message
> > (during the task creation).
> 
> What does the oops precisely say, what's the backtrace about?
> 
> > can somebody help me to patch correctly my kernel?
> 
> Is your kernel patch publicly available? What parts does it touch
> (critical for ipipe are IRQ and timer management).
> 
> Maybe someone from the PPC fraction on this list can comment on the
> status of vanilla 2.6.16 vs. 2.6.14, also wrt ipipe/xenomai.

It's more an I-pipe issue than a Xenomai one. For the time being, 2.6.14
from kernel.org is the current version Adeos/ppc supports, until the
refactoring between arch/ppc and arch/powerpc the kernel folks are
currently having fun with, has been completed, especially for the
embedded side of the universe. The current Adeos 2.6.14/ppc patch also
applies cleanly against Denx's latest snapshot:
ftp://ftp.denx.de/pub/linux/linux-2.6.14.tar.bz2

-- 
Philippe.